A small mouthpiece, 0.02mm narrower than the 40. An extremely small mouthpiece with a shallow B cup. This mouthpiece, with its wide-rounded rim, works well for the trumpet player who doubles on trombone. - the manufacturer
Features: • 22.51mm rim diameter • 5.95mm (0.2344" or 15/64") throat • Standard blank • Semi-shallow "B" cup • Standard rim • Standard backbore • Standard small shank • Silver plated
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